Exercise may reverse age-related bone loss in middle-aged men Researchers have found that certain types of weight-lifting and jumping exercises, when completed for at least six months, improve bone density in active, healthy, middle-aged men with low bone mass. These exercises may help prevent osteoporosis by facilitating bone growth.

Intellectual pursuits may buffer brain against addiction Challenging the idea that addiction is hardwired in the brain, a new study of mice suggests that even a short time spent in a stimulating learning environment can rewire the brain's reward system and buffer it against drug dependence.

Physician peer influence affects repeat prescriptions A new study finds that peer influence among physicians can affect both trial and repeat prescription behavior of a risky new prescription drug. The study tracks prescriptions of a new drug over 17 months, and measures the discussion and patient referral connections among physicians in New York, Los Angeles, and San Francisco.

Impact of Type 2 diabetes on lymphatic vessels identified Approximately 28 million Americans live with Type 2 diabetes, a condition characterized by high blood sugar levels. Until now, the disease's effect on the body's lymphatic vessels has been unknown. A study has identified for the first time how the condition affects lymphatic vessels -- a finding that could lay the groundwork for new therapies to improve the lives of people with Type 2 diabetes.